Stove.



E. G. VAN WIE & R. W. DAVENPORT. STOVE.

APPLICATION FILED FEB-11, 1914.-

Patented Mar. 9, 1915.

l m 1 m WITNESSES: l/VI/E/l/TORS XKVZM anwmWlm mparz ATTORNEYS THE NORRIS PETERS CO. PHOTD'LITHQ. WASHINGYON. D4 C EDWIN G. VAN WIE AND RANSOM W. DAVENEORT, OF DETROIT, MICHIGAN, ASSIGNORS TO DETROIT STOVE "WORKS, 0T5 DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

STOVE.

Application filed February 11, 191a.

To all whom it may concern:

Be it known that we, EDWIN G. VAN WIE and RANsoM W. DAVENPORT, citizens of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Stoves, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to stoves designed to use bituminous fuel, and the invention has particular reference, first, to the construction for facilitating smokeless combustion; second, to the air-heating means, and further, various features of construction as hereinafter set forth.

In the drawings: Figure l is a central, longitudinal section through the stove; and Fig. 2 is a perspective view of the ring for heating the air which supports combustion.

A is the fire-pot section of the stove, and I3 is the superposed section forming the combustion chamber. Intermediate this section is an air-heating, hollow ring 0, through which air is admitted and, after being pro-heated, is delivered into the combustion chamber near the top of the fuel bed. "With constructions of this type, which have heretofore been used, it is customary to deliver the air from the ring in a radial direction by providing a series of jet apertures around the inner wall thereof. Such constructions do not, however, produce a thorough commingling of the heated air with the combustible gases, and consequently the combustion is not as perfect or as free from smoke as desirable. We have discovered that by delivering the air in an angular direction, approaching a tangent to the ring, a much better commingling of the air and combustible gases is produced and consequently more perfect and smokeless combustion. As shown, this result is accomplished by forming the ring C in two sections, and upon one of these sections forming a series of angling ribs or flanges D, which are arranged adjacent to apertures E in the inner wall of the ring. The flanges D are the same on both sides of the ring, but the apertures E on one side are larger, as indicated at E. The reason for this construction is that air is admitted to the ring at the front and then divides, passing in opposite directions around the stove.

Specification 01 Letters Patent.

Patented Man a, 19115.,

Serial N 0. 818,173.

In one direction the flanges D will deflect the current inward to produce the tangential air-jets, but in the opposite direction it is necessary for the air to pass around these flanges and then change direction before passing into the combustion chamber. Thus to secure the discharge of an equal volume upon the latter side the apertures E must be somewhat larger than the apertures E of the first-mentioned side. The air entering the ring is supplied through a draft chamber F having an adjustable damperlid G, and from this chamber F the air passes upward through a slot H in the ring.

In order that the stove may be used for supplying hot air to a drum or radiator, we have provided an air-heater, which is located in the upper part of the combustion chamber in the superposed section B. This comprises an inverted dome-shaped casing I having a lateral inlet J which connect-s with a vertically-extending chamber Within the II on the rear side of the stove. chamber I is a deflector L which is conical in form, its lower end L being oblique to the axis and resting upon the bottom of the casing I at the rear side. The effect is to produce a gradually enlarging opening from the rear to the front of the deflector cone L, so that air entering through the chamber K and lateral inlet J will be compelled to circulate around the casing I before entering into the cone L. Furthermore, as the lateral inlet J is at a higher level than the bottom of the dome-shaped casing I, the air will be obliged to pass downward, which will retard the circulation and hold it for a longer time in contact with the hot surface of the casing.

The section B is provided at its top and at the rear with a flue connection M for the escape of the products of combustion, while the center opening N, which communicates with the cone L is adapted for connection with a hot-air flue (not shown). When the stove is used without a drum, this flue connection is dispensed with and an open-work top P is arranged to cover the opening.

In operation, the chimney draft will draw cold air into the chamber F, from which it will pass forward through the slot I-I into the ring 0, passing around the latter in 01- posite directions and finally passing inward adjacent to and directed by the angling flanges D. This will cause a swirling aircurrent which will thoroughly commingle the air with the combustible gases, and as the air inpassing around the ring has been heated a smokeless combustion will be produced. The heat within the combustion chamber will be communicated to the inverteddomeshaped casing I, and also through the rear Wall of the casing B to the vertical air-inlet chamber K. This will cause an air circulation through said chamber K and lateral passage J into the dome and then around said dome and downward intothe inner cone L. By the time the air is finally discharged into the flue 0 it has been raised to a relatively high temperature, which will be imparted to the drum or radiator to which the current is led.

What we claim as our invention is 1. In a stove, the combination with a fire pot section and a superposed combustion chamber section, of a hollow ring surrounding the stove, intermediate said sections and provided with an air inlet, said ring having apertures in one of its walls and a plurality of obliquely arranged deflector plates independent of the walls of the ring for discharging the air inward in a direction oblique to radial lines.

2. In a stove, the combination with a fire pot section and a superposed combustion chamber section, of a hollow ring surrounding the stove intermediate said sections and having an air inlet, said ring being provided with apertures in the inner wall thereof and with obliquely arranged deflectors adjacent the said apertures and independent of the walls of the ring for discharging the air inward in a direction oblique to radial lines.

3. In a stove, the combination with a fire pot section and a superposed combustion chamber, of a hollow ring extending around the stove and arranged intermediate said sections, said ring having a series of apertures in its inner wall, deflector plates adjacent to said apertures extending obliquely to radial lines, and an air inlet chamber having a segmental slot connection with said ring.

4. In a stove, the combination with a fire pot section and a superposed combustion chamber section, of a hollow ring extending around the stove and arranged intermediate said sections and having an air inlet, said ring being provided with apertures in the inner wall thereof and with obliquely arranged deflectors within the ring adjacent said apertures for discharging the air inward in a direction oblique to radial lines, said deflectors being substantially of the same size and form, and some of the openings in the ring being larger than others.

'5. In a stove, the combination with a fire pot section, a superposed combustion chamber section, of a hollow ring extending around the stove and located intermediate said sections, said ring being provided with a series of apertures in its inner wall and with obliquely arranged deflectors within the ring adjacent the said apertures for discharging the air inward in a direction oblique to radial lines, said deflectors being substantially of the same size and form and some of the apertures in the ring being larger than others, said ring having an air inlet at only one point.

In testimony whereof we ailix our signatures in presence of two witnesses.

EDNIN G. VAN VVIE. RANSOM lV. DAVENPORT. Witnesses:

JAMES P. BARRY, ARTHUR D. PULVER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

